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■normal change switch (change between no tune and normal rom tune ) □2type change switch ( 2 types of data can be changed) (1) this ECU comes with a chargeable battery. when you open the lid, it will be turned on and slight electricity (5v) will destroy data of rom and break ECU (static i guess). please do not peel off the sticker or take off the lid, we do not replace it. (LMAO) (2) make sure to flip the switch 30 sec after you turn off the engine. data might not change until 3-5 min of driving thats what i can gather...soapgun prolly can do better
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